ABB单通道单向驱动功能块Individual Drive Function for Unidirectional Units, IDF_1

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1、IndividualDriveFunctionforUnidirectionalUnits,IDF_1FunctionThesingle-channelindividualdrivefunctionrelaysacontrolcommandtotechnicalcontrolequipment(e.g.electricmotorwithsingledirectionofrotation,solenoidvalve)intheprocess.Thiscommandcancomefromahigher-rankingcontr

2、ol(automaticoperatingmode)ortakeplacemanually(manualoperatingmode).TheoperatingmodeinputsMMandMAhavepriorityoveroperatingmodeselection,i.e.theselectionoftheoperatingmodesmanual/automaticisenabledonlyifbothinputsareonlogic-0signal.Ifbothinputsareonlogic-1signal,the

3、manualoperatingmodehaspriorityoverautomatic.TheoutputofthecontrolcommandOUTcanbemadedependentonsafety,inhibit,localinterventionanderrorsignals.Afterthecontrolcommandhaschanged,thetimeismonitoredasruntimeuntilfeedbackoccurs(endpositionreached).Thefeedbackcanbeexter

4、nal(feedbackvariableavailable)orinternal.Iftheruntimeisexceededanerrormessageappears.Arrivalatendpositions0or1issignaledtoinputsFB0orFB1.Leavingtheendpositionwithoutcontrolcommandissignaledasanerror.TherespectivestateofthecontroloutputOUTisnotchanged.Endpositionmo

5、nitoringtakesplacesirrespectiveofwhetherornotrun-timemonitoringisactivated.IfalocalsignalLOCispresent,thisignoresanyend-positionerrorsthattheremaybeandresetsthem.Runtimeandendpositionmonitoringonlytakesplaceiffeedbackinputsareconnected.InhibitioninputsChangesinthe

6、outputofthecontrolcommandOUTforcommands0and1canbepreventedseparatelyusinginputsIL0andIL1.Inhibitionappliesinmanualandautomaticoperatingmodes.SafetyinterventionTheinputsPR0andPR1actdirectlyonthecontrolcommand.IfsignalsareappliedsimultaneouslyPR0haspriority,i.e.thec

7、ontrolcommandiscanceled.LocalinterventionIfthesignalLOCisapplied,thecontrolelementreceivesitssignalsfromalocaltransmitter.InthiscasethefunctionmoduleretainsitsoperatingmodeandtracksitsoutputOUTtotheendpositions(inputFB0andFB1).FaultTheFLTsignalcancelsthecontrolcom

8、mandandswitchestooperatingmodemanual.ThesubsequentresponseafterafaultsignalhasbeentransmitteddependsontheparametersrelatingtoReactionaftertrouble.A"tran